root/branches/gajim_0.4/common/jabber.py

##   jabber.py
##
##   Copyright (C) 2001 Matthew Allum
##
##   This program is free software; you can redistribute it and/or modify
##   it under the terms of the GNU Lesser General Public License as published
##   by the Free Software Foundation; either version 2, or (at your option)
##   any later version.
##
##   This program is distributed in the hope that it will be useful,
##   but WITHOUT ANY WARRANTY; without even the implied warranty of
##   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
##   GNU Lesser General Public License for more details.
##


"""\

__intro__

jabber.py is a Python module for the jabber instant messaging protocol.
jabber.py deals with the xml parsing and socket code, leaving the programmer
to concentrate on developing quality jabber based applications with Python.

The eventual aim is to produce a fully featured easy to use library for
creating both jabber clients and servers.

jabber.py requires at least python 2.0 and the XML expat parser module
( included in the standard Python distrubution ).

It is developed on Linux but should run happily on over Unix's and win32.

__Usage__

jabber.py basically subclasses the xmlstream classs and provides the
processing of jabber protocol elements into object instances as well
'helper' functions for parts of the protocol such as authentication
and roster management.

An example of usage for a simple client would be ( only psuedo code !)

<> Read documentation on jabber.org for the jabber protocol.

<> Birth a jabber.Client object with your jabber servers host

<> Define callback functions for the protocol elements you want to use
   and optionally a disconnection.

<> Authenticate with the server via auth method, or register via the
   reg methods to get an account.

<> Call requestRoster() and sendPresence()

<> loop over process(). Send Iqs,messages and presences by birthing
   them via there respective clients , manipulating them and using
   the Client's send() method.

<> Respond to incoming elements passed to your callback functions.

<> Find bugs :)


"""

# $Id$

import xmlstream
import sha, time

debug=xmlstream.debug

VERSION = xmlstream.VERSION

False = 0;
True  = 1;

timeout = 300
NAT_TIMEOUT = 60

DBG_INIT, DBG_ALWAYS = debug.DBG_INIT, debug.DBG_ALWAYS
DBG_DISPATCH = 'jb-dispatch'            ; debug.debug_flags.append( DBG_DISPATCH )
DBG_NODE = 'jb-node'                    ; debug.debug_flags.append( DBG_NODE)
DBG_NODE_IQ = 'jb-node-iq'              ; debug.debug_flags.append( DBG_NODE_IQ )
DBG_NODE_MESSAGE = 'jb-node-message'    ; debug.debug_flags.append( DBG_NODE_MESSAGE )
DBG_NODE_PRESENCE = 'jb-node-pressence' ; debug.debug_flags.append( DBG_NODE_PRESENCE )
DBG_NODE_UNKNOWN = 'jb-node-unknown'    ; debug.debug_flags.append( DBG_NODE_UNKNOWN )


#
# JANA core namespaces
#  from http://www.jabber.org/jana/namespaces.php as of 2003-01-12
#  "myname" means that namespace didnt have a name in the jabberd headers
#
NS_AGENT      = "jabber:iq:agent"
NS_AGENTS     = "jabber:iq:agents"
NS_AUTH       = "jabber:iq:auth"
NS_CLIENT     = "jabber:client"
NS_DELAY      = "jabber:x:delay"
NS_OOB        = "jabber:iq:oob"
NS_REGISTER   = "jabber:iq:register"
NS_ROSTER     = "jabber:iq:roster"
NS_XROSTER    = "jabber:x:roster" # myname
NS_SERVER     = "jabber:server"
NS_TIME       = "jabber:iq:time"
NS_VERSION    = "jabber:iq:version"

NS_COMP_ACCEPT  = "jabber:component:accept" # myname
NS_COMP_CONNECT = "jabber:component:connect" # myname



#
# JANA JEP namespaces, ordered by JEP
#  from http://www.jabber.org/jana/namespaces.php as of 2003-01-12
#  all names by jaclu
#
_NS_PROTOCOL  = "http://jabber.org/protocol" # base for other
NS_PASS       = "jabber:iq:pass" # JEP-0003
NS_XDATA      = "jabber:x:data" # JEP-0004
NS_RPC        = "jabber:iq:rpc" # JEP-0009
NS_BROWSE     = "jabber:iq:browse" # JEP-0011
NS_LAST       = "jabber:iq:last" #JEP-0012
NS_PRIVACY    = "jabber:iq:privacy" # JEP-0016
NS_XEVENT     = "jabber:x:event" # JEP-0022
NS_XEXPIRE    = "jabber:x:expire" # JEP-0023
NS_XENCRYPTED = "jabber:x:encrypted" # JEP-0027
NS_XSIGNED    = "jabber:x:signed" # JEP-0027
NS_P_MUC      = _NS_PROTOCOL + "/muc" # JEP-0045
NS_P_MUC_ADMIN = NS_P_MUC + "#admin" # JEP-0045
NS_P_MUC_OWNER = NS_P_MUC + "#owner" # JEP-0045
NS_P_MUC_USER  = NS_P_MUC + "#user" # JEP-0045
NS_VCARD      = "vcard-temp" # JEP-0054


#
# Non JANA aproved, ordered by JEP
#  all names by jaclu
#
_NS_P_DISCO     = _NS_PROTOCOL + "/disco" # base for other
NS_P_DISC_INFO  = _NS_P_DISCO + "#info" # JEP-0030
NS_P_DISC_ITEMS = _NS_P_DISCO + "#items" # JEP-0030
NS_P_COMMANDS   = _NS_PROTOCOL + "/commands" # JEP-0050


"""
 2002-01-11 jaclu

 Defined in jabberd/lib/lib.h, but not JANA aproved and not used in jabber.py
 so commented out, should/could propably be removed...

 NS_ADMIN      = "jabber:iq:admin"
 NS_AUTH_OK    = "jabber:iq:auth:0k"
 NS_CONFERENCE = "jabber:iq:conference"
 NS_ENVELOPE   = "jabber:x:envelope"
 NS_FILTER     = "jabber:iq:filter"
 NS_GATEWAY    = "jabber:iq:gateway"
 NS_OFFLINE    = "jabber:x:offline"
 NS_PRIVATE    = "jabber:iq:private"
 NS_SEARCH     = "jabber:iq:search"
 NS_XDBGINSERT = "jabber:xdb:ginsert"
 NS_XDBNSLIST  = "jabber:xdb:nslist"
 NS_XHTML      = "http://www.w3.org/1999/xhtml"
 NS_XOOB       = "jabber:x:oob"
 NS_COMP_EXECUTE = "jabber:component:execute" # myname
"""


## Possible constants for Roster class .... hmmm ##
RS_SUB_BOTH    = 0
RS_SUB_FROM    = 1
RS_SUB_TO      = 2

RS_ASK_SUBSCRIBE   = 1
RS_ASK_UNSUBSCRIBE = 0

RS_EXT_ONLINE   = 2
RS_EXT_OFFLINE  = 1
RS_EXT_PENDING  = 0

#############################################################################

def ustr(what):
    """If sending object is already a unicode str, just
       return it, otherwise convert it using xmlstream.ENCODING"""
    if type(what) == type(u''):
        r = what
    else:
        try: r = what.__str__()
        except AttributeError: r = str(what)
        # make sure __str__() didnt return a unicode
        if type(r) <> type(u''):
            r = unicode(r,xmlstream.ENCODING,'replace')
    return r
xmlstream.ustr = ustr

class NodeProcessed(Exception): pass   # currently only for Connection._expectedIqHandler

class Connection(xmlstream.Client):
    """Forms the base for both Client and Component Classes"""
    def __init__(self, host, port, namespace,
                 debug=[], log=False, connection=xmlstream.TCP, hostIP=None, proxy=None):

        xmlstream.Client.__init__(self, host, port, namespace,
                                  debug=debug, log=log,
                                  connection=connection,
                                  hostIP=hostIP, proxy=proxy)
        self.handlers={}
        self.registerProtocol('unknown', Protocol)
        self.registerProtocol('iq', Iq)
        self.registerProtocol('message', Message)
        self.registerProtocol('presence', Presence)

        self.registerHandler('iq',self._expectedIqHandler,system=True)

        self._expected = {}

        self._id = 0;
        self._lastIncome = time.time()

        self.lastErr = ''
        self.lastErrCode = 0

    def setMessageHandler(self, func, type='', chainOutput=False):
        """Back compartibility method"""
        print "WARNING! setMessageHandler(...) method is obsolette, use registerHandler('message',...) instead."
        return self.registerHandler('message', func, type, chained=chainOutput)

    def setPresenceHandler(self, func, type='', chainOutput=False):
        """Back compartibility method"""
        print "WARNING! setPresenceHandler(...) method is obsolette, use registerHandler('presence',...) instead."
        return self.registerHandler('presence', func, type, chained=chainOutput)

    def setIqHandler(self, func, type='', ns=''):
        """Back compartibility method"""
        print "WARNING! setIqHandler(...) method is obsolette, use registerHandler('iq',...) instead."
        return self.registerHandler('iq', func, type, ns)

    def header(self):
        self.DEBUG("stream: sending initial header",DBG_INIT)
        str = u"<?xml version='1.0' encoding='UTF-8' ?>   \
                <stream:stream to='%s' xmlns='%s'" % ( self._host,
                                                       self._namespace )

        if self._outgoingID: str = str + " id='%s' " % self._outgoingID
        str = str + " xmlns:stream='http://etherx.jabber.org/streams'>"
        self.send(str)
        self.process(timeout)

    def send(self, what):
        """Sends a jabber protocol element (Node) to the server"""
        xmlstream.Client.write(self,ustr(what))

    def _expectedIqHandler(self, conn, iq_obj):
        if iq_obj.getAttr('id') and \
           self._expected.has_key(iq_obj.getAttr('id')):
            self._expected[iq_obj.getAttr('id')] = iq_obj
            raise NodeProcessed('No need for further Iq processing.')

    def dispatch(self,stanza):
        """Called internally when a 'protocol element' is received.
           Builds the relevant jabber.py object and dispatches it
           to a relevant function or callback."""
        self._lastIncome = time.time()
        name=stanza.getName()
        if not self.handlers.has_key(name):
            self.DEBUG("whats a tag -> " + name,DBG_NODE_UNKNOWN)
            name='unknown'
        else:
            self.DEBUG("Got %s stanza"%name, DBG_NODE)

        stanza=self.handlers[name][type](node=stanza)

        typ=stanza.getType()
        if not typ: typ=''
        try:
            ns=stanza.getQuery()
            if not ns: ns=''
        except: ns=''
        self.DEBUG("dispatch called for: name->%s ns->%s"%(name,ns),DBG_DISPATCH)

        if typ and ns: typns=typ+ns
        else: typns=''
        if not self.handlers[name].has_key(ns): ns=''
        if not self.handlers[name].has_key(typ): typ=''
        if not self.handlers[name].has_key(typns): typns=''

        chain=[]
        for key in ['default',typ,ns,typns]: # we will use all handlers: from very common to very particular
            if key: chain += self.handlers[name][key]

        output=''
        user=True
        for handler in chain:
            try:
                if user or handler['system']:
                    if handler['chain']: output=handler['func'](self,stanza,output)
                    else: handler['func'](self,stanza)
            except NodeProcessed: user=False

    def registerProtocol(self,tag_name,Proto):
        """Registers a protocol in protocol processing chain. You MUST register
           a protocol before you register any handler function for it.
           First parameter, that passed to this function is the tag name that
           belongs to all protocol elements. F.e.: message, presence, iq, xdb, ...
           Second parameter is the [ancestor of] Protocol class, which instance will
           built from the received node with call

                if received_packet.getName()==tag_name:
                    stanza = Proto(node = received_packet)
        """
        self.handlers[tag_name]={type:Proto, 'default':[]}

    def registerHandler(self,name,handler,type='',ns='',chained=False, makefirst=False, system=False):
        """Sets the callback func for processing incoming stanzas.
           Multiple callback functions can be set which are called in
           succession. Callback can optionally raise an NodeProcessed error to
           stop stanza from further processing. A type and namespace attributes can
           also be optionally passed so the callback is only called when a stanza of
           this type is received. Namespace attribute MUST be omitted if you
           registering an Iq processing handler.

           If 'chainOutput' is set to False (the default), the given function
           should be defined as follows:

                def myCallback(c, p)

           Where the first parameter is the Client object, and the second
           parameter is the [ancestor of] Protocol object representing the stanza
           which was received.

           If 'chainOutput' is set to True, the output from the various
           handler functions will be chained together.  In this case,
           the given callback function should be defined like this:

                def myCallback(c, p, output)

           Where 'output' is the value returned by the previous
           callback function.  For the first callback routine, 'output' will be
           set to an empty string.

           'makefirst' argument gives you control over handler prioriy in its type
           and namespace scope. Note that handlers for particular type or namespace always
           have lower priority that common handlers.
        """
        if not type and not ns: type='default'
        if not self.handlers[name].has_key(type+ns): self.handlers[name][type+ns]=[]
        if makefirst: self.handlers[name][type+ns].insert(0, {'chain':chained,'func':handler,'system':system})
        else: self.handlers[name][type+ns].append({'chain':chained,'func':handler,'system':system})

    def setDisconnectHandler(self, func):
        """Set the callback for a disconnect.
           The given function will be called with a single parameter (the
           connection object) when the connection is broken unexpectedly (eg,
           in response to sending badly formed XML).  self.lastErr and
           self.lastErrCode will be set to the error which caused the
           disconnection, if any.
        """
        self.disconnectHandler = func

    ## functions for sending element with ID's ##

    def waitForResponse(self, ID, timeout=timeout):
        """Blocks untils a protocol element with the given id is received.
           If an error is received, waitForResponse returns None and
           self.lastErr and self.lastErrCode is set to the received error.  If
           the operation times out (which only happens if a timeout value is
           given), waitForResponse will return None and self.lastErr will be
           set to "Timeout".
           Changed default from timeout=0 to timeout=300 to avoid hangs in
           scripts and such.
           If you _really_ want no timeout, just set it to 0"""
        ID = ustr(ID)
        self._expected[ID] = None
        has_timed_out = False

        abort_time = time.time() + timeout
        if timeout:
            self.DEBUG("waiting with timeout:%s for %s" % (timeout,ustr(ID)),DBG_NODE_IQ)
        else:
            self.DEBUG("waiting for %s" % ustr(ID),DBG_NODE_IQ)

        while (not self._expected[ID]) and not has_timed_out:
            if not self.process(0.2): return None
            if timeout and (time.time() > abort_time):
                has_timed_out = True
        if has_timed_out:
            self.lastErr = "Timeout"
            return None
        response = self._expected[ID]
        del self._expected[ID]
        if response.getErrorCode():
            self.lastErr     = response.getError()
            self.lastErrCode = response.getErrorCode()
            return None
        return response

    def SendAndWaitForResponse(self, obj, ID=None, timeout=timeout):
        """Sends a protocol element object and blocks until a response with
           the same ID is received.  The received protocol object is returned
           as the function result. """
        if ID is None :
            ID = obj.getID()
            if ID is None:
                ID = self.getAnID()
                obj.setID(ID)
        ID = ustr(ID)
        self.send(obj)
        return self.waitForResponse(ID,timeout)

    def getAnID(self):
        """Returns a unique ID"""
        self._id = self._id + 1
        return ustr(self._id)

    def process(self, timeout=0):
        if time.time() > self._lastIncome + NAT_TIMEOUT:
            self._lastIncome = time.time()
            iq = Iq(type="get", to=self._host, query=NS_LAST)
            if not self.SendAndWaitForResponse(iq, timeout=30):
                self.disconnectHandler(self)
        return xmlstream.Client.process(self, timeout)

#############################################################################

class Client(Connection):
    """Class for managing a client connection to a jabber server."""
    def __init__(self, host, port=5222, debug=[], log=False,
                 connection=xmlstream.TCP, hostIP=None, proxy=None):

        Connection.__init__(self, host, port, NS_CLIENT, debug, log,
                            connection=connection, hostIP=hostIP, proxy=proxy)

        self.registerHandler('iq',self._IqRosterManage,'result',NS_ROSTER,system=True)
        self.registerHandler('iq',self._IqRosterManage,'set',NS_ROSTER,system=True)
        self.registerHandler('iq',self._IqRegisterResult,'result',NS_REGISTER,system=True)
        self.registerHandler('iq',self._IqAgentsResult,'result',NS_AGENTS,system=True)
        self.registerHandler('presence',self._presenceHandler,system=True)

        self._roster = Roster()
        self._agents = {}
        self._reg_info = {}
        self._reg_agent = ''

    def disconnect(self):
        """Safely disconnects from the connected server"""
        self.send(Presence(type='unavailable'))
        xmlstream.Client.disconnect(self)

    def sendPresence(self,type=None,priority=None,show=None,status=None,signedStatus=None):
        """Sends a presence protocol element to the server.
           Used to inform the server that you are online"""
        presence = Presence(type=type,priority=priority,show=show,status=status)
        if signedStatus:
            presence.setX(NS_XSIGNED).insertData(signedStatus)
        self.send(presence)

    sendInitPresence=sendPresence

    def _presenceHandler(self, conn, pres_obj):
        who = ustr(pres_obj.getFrom())
        type = pres_obj.getType()
        self.DEBUG("presence type is %s" % type,DBG_NODE_PRESENCE)
        if type == 'available' or not type:
            self.DEBUG("roster setting %s to online" % who,DBG_NODE_PRESENCE)
            self._roster._setOnline(who,'online')
        elif type == 'unavailable':
            self.DEBUG("roster setting %s to offline" % who,DBG_NODE_PRESENCE)
            self._roster._setOnline(who,'offline')
        self._roster._setShow(who,pres_obj.getShow())
        self._roster._setStatus(who,pres_obj.getStatus())

    def _IqRosterManage(self, conn, iq_obj):
        "NS_ROSTER and type in [result,set]"
        for item in iq_obj.getQueryNode().getChildren():
            jid  = item.getAttr('jid')
            name = item.getAttr('name')
            sub  = item.getAttr('subscription')
            ask  = item.getAttr('ask')

            groups = []
            for group in item.getTags("group"):
                groups.append(group.getData())

            if jid:
                if sub == 'remove' or (sub == 'none' and not ask):
                    self._roster._remove(jid)
                else:
                    self._roster._set(jid=jid, name=name,
                                      groups=groups, sub=sub,
                                      ask=ask)
            else:
                self.DEBUG("roster - jid not defined ?",DBG_NODE_IQ)

    def _IqRegisterResult(self, conn, iq_obj):
        "NS_REGISTER and type==result"
        self._reg_info = {}
        for item in iq_obj.getQueryNode().getChildren():
            self._reg_info[item.getName()] = item.getData()

    def _IqAgentsResult(self, conn, iq_obj):
        "NS_AGENTS and type==result"
        self.DEBUG("got agents result",DBG_NODE_IQ)
        self._agents = {}
        for agent in iq_obj.getQueryNode().getChildren():
            if agent.getName() == 'agent': ## hmmm
                self._agents[agent.getAttr('jid')] = {}
                for info in agent.getChildren():
                    self._agents[agent.getAttr('jid')][info.getName()] = info.getData()

    def auth(self,username,passwd,resource):
        """Authenticates and logs in to the specified jabber server
           Automatically selects the 'best' authentication method
           provided by the server.
           Supports plain text, digest and zero-k authentication.

           Returns True if the login was successful, False otherwise.
        """
        auth_get_iq = Iq(type='get')
        auth_get_iq.setID('auth-get')
        q = auth_get_iq.setQuery(NS_AUTH)
        q.insertTag('username').insertData(username)
        self.send(auth_get_iq)

        auth_response = self.waitForResponse("auth-get")
        if auth_response == None:
            return False # Error
        else:
            auth_ret_node = auth_response

        auth_ret_query = auth_ret_node.getTag('query')
        self.DEBUG("auth-get node arrived!",(DBG_INIT,DBG_NODE_IQ))

        auth_set_iq = Iq(type='set')
        auth_set_iq.setID('auth-set')

        q = auth_set_iq.setQuery(NS_AUTH)
        q.insertTag('username').insertData(username)
        q.insertTag('resource').insertData(resource)

        if auth_ret_query.getTag('token'):

            token = auth_ret_query.getTag('token').getData()
            seq = auth_ret_query.getTag('sequence').getData()
            self.DEBUG("zero-k authentication supported",(DBG_INIT,DBG_NODE_IQ))
            hash = sha.new(sha.new(passwd).hexdigest()+token).hexdigest()
            for foo in xrange(int(seq)): hash = sha.new(hash).hexdigest()
            q.insertTag('hash').insertData(hash)

        elif auth_ret_query.getTag('digest'):

            self.DEBUG("digest authentication supported",(DBG_INIT,DBG_NODE_IQ))
            digest = q.insertTag('digest')
            digest.insertData(sha.new(
                self.getIncomingID() + passwd).hexdigest() )
        else:
            self.DEBUG("plain text authentication supported",(DBG_INIT,DBG_NODE_IQ))
            q.insertTag('password').insertData(passwd)

        iq_result = self.SendAndWaitForResponse(auth_set_iq)

        if iq_result==None:
             return False
        if iq_result.getError() is None:
            return True
        else:
           self.lastErr     = iq_result.getError()
           self.lastErrCode = iq_result.getErrorCode()
           # raise error(iq_result.getError()) ?
           return False
        return True

    ## Roster 'helper' func's - also see the Roster class ##

    def requestRoster(self):
        """Requests the roster from the server and returns a
           Roster() class instance."""
        rost_iq = Iq(type='get')
        rost_iq.setQuery(NS_ROSTER)
        self.SendAndWaitForResponse(rost_iq)
        self.DEBUG("got roster response",DBG_NODE_IQ)
        self.DEBUG("roster -> %s" % ustr(self._roster),DBG_NODE_IQ)
        return self._roster


    def getRoster(self):
        """Returns the current Roster() class instance. Does
           not contact the server."""
        return self._roster


    def addRosterItem(self, jid):
        """ Send off a request to subscribe to the given jid.
        """
        self.send(Presence(to=jid, type="subscribe"))


    def updateRosterItem(self, jid, name=None, groups=None):
        """ Update the information stored in the roster about a roster item.

            'jid' is the Jabber ID of the roster entry; 'name' is the value to
            set the entry's name to, and 'groups' is a list of groups to which
            this roster entry can belong.  If either 'name' or 'groups' is not
            specified, that value is not updated in the roster.
        """
        iq = Iq(type='set')
        item = iq.setQuery(NS_ROSTER).insertTag('item')
        item.putAttr('jid', ustr(jid))
        if name != None: item.putAttr('name', name)
        if groups != None:
            for group in groups:
                item.insertTag('group').insertData(group)
        dummy = self.SendAndWaitForResponse(iq) # Do we need to wait??


    def removeRosterItem(self,jid):
        """Removes an item with Jabber ID jid from both the
           server's roster and the local internal Roster()
           instance"""
        rost_iq = Iq(type='set')
        q = rost_iq.setQuery(NS_ROSTER).insertTag('item')
        q.putAttr('jid', ustr(jid))
        q.putAttr('subscription', 'remove')
        self.SendAndWaitForResponse(rost_iq)
        return self._roster

    ## Registration 'helper' funcs ##

    def requestRegInfo(self,agent=''):
        """Requests registration info from the server.
           Returns the Iq object received from the server."""
        if agent.find('.') == -1:
            if agent: agent += '.'
            agent += self._host
        self._reg_info = {}
        reg_iq = Iq(type='get', to = agent)
        reg_iq.setQuery(NS_REGISTER)
        self.DEBUG("Requesting reg info from %s:" % agent, DBG_NODE_IQ)
        self.DEBUG(ustr(reg_iq),DBG_NODE_IQ)
        return self.SendAndWaitForResponse(reg_iq)


    def getRegInfo(self):
        """Returns a dictionary of fields requested by the server for a
           registration attempt.  Each dictionary entry maps from the name of
           the field to the field's current value (either as returned by the
           server or set programmatically by calling self.setRegInfo(). """
        return self._reg_info


    def setRegInfo(self,key,val):
        """Sets a name/value attribute. Note: requestRegInfo must be
           called before setting."""
        self._reg_info[key] = val


    def sendRegInfo(self, agent=''):
        """Sends the populated registration dictionary back to the server"""
        if agent.find('.') == -1:
            if agent: agent += '.'
            agent += self._host
        reg_iq = Iq(to = agent, type='set')
        q = reg_iq.setQuery(NS_REGISTER)
        for info in self._reg_info.keys():
            q.insertTag(info).putData(self._reg_info[info])
        return self.SendAndWaitForResponse(reg_iq)


    def deregister(self, agent=''):
        """ Send off a request to deregister with the server or with the given
            agent.  Returns True if successful, else False.

            Note that you must be authorised before attempting to deregister.
        """
        if agent:
            if agent.find('.') == -1:
                agent += '.' + self._host
            self.send(Presence(to=agent,type='unsubscribed'))       # This is enough f.e. for icqv7t or jit
        else: agent = self._host
        q = self.requestRegInfo()
        kids = q.getQueryPayload()</